331428258 has 54 divisors (see below), whose sum is σ = 836699409. Its totient is φ = 94539312.

The previous prime is 331428247. The next prime is 331428259. The reversal of 331428258 is 852824133.

It can be written as a sum of positive squares in 2 ways, for example, as 184606569 + 146821689 = 13587^2 + 12117^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=12873.

It is not an unprimeable number, because it can be changed into a prime (331428259) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 540360 + ... + 540972.

Almost surely, 2^331428258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331428258

331428258 is an abundant number, since it is smaller than the sum of its proper divisors (505271151).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331428258 is an equidigital number, since it uses as much as digits as its factorization.

331428258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 625 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 331428258 is about 18205.1711884289. The cubic root of 331428258 is about 692.0378444448.

The spelling of 331428258 in words is "three hundred thirty-one million, four hundred twenty-eight thousand, two hundred fifty-eight".